PmGRacer
Aluminum
- Joined
- Dec 18, 2008
- Location
- Oakland Twp. Mi
Hello gentlemen. Over last few days I have torn down spindle of my 10k to replace the roller thrust bearing with a SKF 51107 roller thrust bearing. As you would guess a few unexpected items needing attention popped up![emoji33][emoji1]
First, the faces of the Bull gear and the Cone pulley looked like they got in a fight that everybody lost.
I wasn't pleased with this blatant disregard for maintenance but all I could do is repair it. I chucked up the cone pulley and did a clearance cut up to the diameter of the damage.
This gave me a "boss" to do a clean up pass on. The clearance between boss and cone face is only 0.005". Next I put the cone on a surface grinder and ground the face until it cleaned up.
Next I rotated the cone every 45 degrees on the chuck leaving the wheel at zero to spark out the surface. I did 8 "clockings".
I then did the same to the Bull gear hub face.
Once I cleaned it up I cleaned off a granite surface plate and started lapping the faces with 280,400,600 and 1200 grit paper.
Both finished:
I have only used spindle oil to lube the cone but I believe the face damage was already done when I got the lathe. Based on the research I've done in the forum, Roy Dean Grease isn't happening for me. Not sure if I'm going to use the Soy based lithium either. I am thinking of using Vactra Way lube often. I prefer to use oil over grease-quirky I know[emoji12]. Question here is should I make a relief in the cone face for oil to travel between the faces? Logic tells me I will be doing this repair again if I don't ensure proper lubrication often.
I did order new capillary oilers for the spindle. I am working on cleaning up the bearings, oil sling gutters and the oil wells. Is there any solvent that will cut the old oil build up off the bearings better than mineral spirits? This is the state of the bearings now:
They don't look fantastic but I believe they are still good. The spindle had 0.001" play before I removed it and has always left a good finish on my work pieces. It looks like at one point the oil got hot and started to burn but the bearing surface looks ok. The burnt oil will come off with some work using min spirits on the blue shop towel. I do not want to use Scotch Brite or any other abrasive; just patience and solvent.
The spindle needs some polishing on the cone diameter. I want to make a brass/bronze lap and use lapping compound to bring surface back. I will post that if I make that happen.
Sorry for the long post gentlemen. I will post updates as I put it back together.
Sent from my iPhone using Tapatalk
First, the faces of the Bull gear and the Cone pulley looked like they got in a fight that everybody lost.
I wasn't pleased with this blatant disregard for maintenance but all I could do is repair it. I chucked up the cone pulley and did a clearance cut up to the diameter of the damage.
This gave me a "boss" to do a clean up pass on. The clearance between boss and cone face is only 0.005". Next I put the cone on a surface grinder and ground the face until it cleaned up.
Next I rotated the cone every 45 degrees on the chuck leaving the wheel at zero to spark out the surface. I did 8 "clockings".
I then did the same to the Bull gear hub face.
Once I cleaned it up I cleaned off a granite surface plate and started lapping the faces with 280,400,600 and 1200 grit paper.
Both finished:
I have only used spindle oil to lube the cone but I believe the face damage was already done when I got the lathe. Based on the research I've done in the forum, Roy Dean Grease isn't happening for me. Not sure if I'm going to use the Soy based lithium either. I am thinking of using Vactra Way lube often. I prefer to use oil over grease-quirky I know[emoji12]. Question here is should I make a relief in the cone face for oil to travel between the faces? Logic tells me I will be doing this repair again if I don't ensure proper lubrication often.
I did order new capillary oilers for the spindle. I am working on cleaning up the bearings, oil sling gutters and the oil wells. Is there any solvent that will cut the old oil build up off the bearings better than mineral spirits? This is the state of the bearings now:
They don't look fantastic but I believe they are still good. The spindle had 0.001" play before I removed it and has always left a good finish on my work pieces. It looks like at one point the oil got hot and started to burn but the bearing surface looks ok. The burnt oil will come off with some work using min spirits on the blue shop towel. I do not want to use Scotch Brite or any other abrasive; just patience and solvent.
The spindle needs some polishing on the cone diameter. I want to make a brass/bronze lap and use lapping compound to bring surface back. I will post that if I make that happen.
Sorry for the long post gentlemen. I will post updates as I put it back together.
Sent from my iPhone using Tapatalk